The Negative Absorption of Radiation

Raman, C. V.; Krishnan, K. S.

doi:10.1038/122012b0

Cited by 41 publications

(23 citation statements)

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“…molecules in the upper quantum state may return to the lower quantum state in such a way as to reinforce the primary beam by 'negative absorption' ". It should be noted that even one of famous Raman's papers of 1928 was called "The negative absorption of radiation" [35]. From today's knowledge we know that for the first time population inversion in the laboratory was achieved and induced emission was observed by E. Purcell and R. Pound during a short time interval in spin system using LiF crystal in 1950 (publication [36] of 1951) without amplification effect.…”

Section: Brief History Of Negative Absorptionmentioning

confidence: 99%

Valentin A. Fabrikant: negative absorption, his 1951 patent application for amplification of electromagnetic radiation (ultraviolet, visible, infrared and radio spectral regions) and his experiments

Lukishova¹

2010

J. Eur. Opt. Soc.-Rapid Publ.

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This paper is devoted to Moscow physicist Valentin A. Fabrikant who is known for his 1939 thesis with suggestion of experiments on light amplification directly proving the existence of negative absorption in gas discharge, his 1951 patent application (jointly with M. M. Vudynsky and F. A. Butaeva) for amplification of electromagnetic radiation (ultraviolet, visible, infrared and radio spectral regions), and his experimental attempts (jointly with F. A. Butaeva) to observe light amplification in gas discharge (paper submission of December 1957).

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Section: Brief History Of Negative Absorptionmentioning

confidence: 99%

Valentin A. Fabrikant: negative absorption, his 1951 patent application for amplification of electromagnetic radiation (ultraviolet, visible, infrared and radio spectral regions) and his experiments

Lukishova¹

2010

J. Eur. Opt. Soc.-Rapid Publ.

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“…Одна из них под заголовком «Отрицательное погло-щение излучения», опубликовано в «Nature» от 7 июля 1928 г. 9 . В этой работе Раман и Кришнан наблюдают фиолетовые сателлиты комбинацион-ного рассеяния света.…”

Section: «новый тип вторичного излученияunclassified

The discovery of combinational scattering of light (the Raman effect)

Fabelinskiĭ¹

1978

Usp. Fiz. Nauk

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“…As the Raman fingerprint contains rich biological information, variations due to disease or inflammatory processes can be readily observed in the spectral profile [10]. Applications for Raman spectroscopy are rapidly growing, as a tool for disease diagnosis, monitoring disease progression post-treatment, and evaluating treatment effectiveness [11,12]. …”

Section: Introductionmentioning

confidence: 99%

Investigating Effects of Proteasome Inhibitor on Multiple Myeloma Cells Using Confocal Raman Microscopy

Kang

Singh

Nguyen

et al. 2016

Sensors

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Due to its label-free and non-destructive nature, applications of Raman spectroscopic imaging in monitoring therapeutic responses at the cellular level are growing. We have recently developed a high-speed confocal Raman microscopy system to image living biological specimens with high spatial resolution and sensitivity. In the present study, we have applied this system to monitor the effects of Bortezomib, a proteasome inhibitor drug, on multiple myeloma cells. Cluster imaging followed by spectral profiling suggest major differences in the nuclear and cytoplasmic contents of cells due to drug treatment that can be monitored with Raman spectroscopy. Spectra were also acquired from group of cells and feasibility of discrimination among treated and untreated cells using principal component analysis (PCA) was accessed. Findings support the feasibility of Raman technologies as an alternate, novel method for monitoring live cell dynamics with minimal external perturbation.

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The Negative Absorption of Radiation

Cited by 41 publications

References 0 publications

Valentin A. Fabrikant: negative absorption, his 1951 patent application for amplification of electromagnetic radiation (ultraviolet, visible, infrared and radio spectral regions) and his experiments

Valentin A. Fabrikant: negative absorption, his 1951 patent application for amplification of electromagnetic radiation (ultraviolet, visible, infrared and radio spectral regions) and his experiments

The discovery of combinational scattering of light (the Raman effect)

Investigating Effects of Proteasome Inhibitor on Multiple Myeloma Cells Using Confocal Raman Microscopy

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